2101021040 has 40 divisors (see below), whose sum is σ = 4920555600. Its totient is φ = 834269696.

The previous prime is 2101021033. The next prime is 2101021049. The reversal of 2101021040 is 401201012.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101021049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84890 + ... + 106809.

It is an arithmetic number, because the mean of its divisors is an integer number (123013890).

Almost surely, 2^2101021040 is an apocalyptic number.

2101021040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2101021040 is an abundant number, since it is smaller than the sum of its proper divisors (2819534560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2101021040 is a wasteful number, since it uses less digits than its factorization.

2101021040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191849 (or 191843 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 2101021040 is about 45836.8960554704. The cubic root of 2101021040 is about 1280.7866746221.

Adding to 2101021040 its reverse (401201012), we get a palindrome (2502222052).

The spelling of 2101021040 in words is "two billion, one hundred one million, twenty-one thousand, forty".